About concept of the app.
App concept is good but the app contains lots and loads of bugs and tweaks in this app which make device slower in 512MB devices. Concept of this app is quite similar to whatsapp, hike, and messenger. This app contains 40-45MB in device and UI of this app is really good and very interesting.
About layout design
This app has very impressive UI and design. It has many features like whatsapp but sticker? which is quite different and interesting in this app. There are many stickers in this app albut the problem is we have to download the stickers to use but also takes lots of space in the phone memory.
About features and function
It has very good features and benefits in this app. You can make a video calls and audio calls with high quality and high definition video calls that’s pretty cool feature in this app. But the app is so laggy and slow working . Waste of download it when you observe the slow working app and you will get irritated by this app.
About usefulness of viber.
It is much useful to make a call or a video call because there are many apps in the store with low storage space and works faster then this application. I prefer others app to use because this app irritates you by it slower working.